How to dress baby and toddler under sleep sack in winter and summer. Printable chart and guide for what to wear under sleep sack. Winter is here! We know it can be confusing to know what sleepwear your baby needs as the temperature starts to drop. With this simple guide you can see what sleepwear is Why Scandinavians Let Their Babies Nap Outside In the Winter A great alternative to putting blankets on your newborns is sleep sacks and warmer onesies." Make sure your baby has room to breath while they sleep during this winter season! Get more # Dressing Guide: How to Layer Your Baby for Winter & Cold Weather Purebaby How to Dress Baby for Sleep in the Winter Petite Dreamers